Question: when was the end of the relationship between Gore Vidal and Howard Austen?
Paraphrase: When was the end of the Gore Vidal - Howard Austen relationship?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q167821 p:P451 ?s . ?s ps:P451 wd:Q17309157 . ?s pq:P580 ?value1 . ?s pq:P582 ?value2 }